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Activity 2 Practice
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1. Which of the numbers below is NOT a prime number?
13 37 39 47
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2. Which is the prime factorization of 81?
1 X 81 3 X 27 9 X 9 3 X 3 X 3 X 3
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3. Which of the following is a prime number between 80 and 90?
81 88 83 91
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4. 2 X 3 X 4 is the prime factorization of what number?
24 9 234 It isn’t a prime factorization of any number.
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5. What is the prime factorization of 36?
6 X 6 2 X 2 X 3 X 3 2 X 3 X 6 None of the above
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6. Which of the following is a composite number?
43 75 101 23
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7. Which of the following numbers equals 25 x 32?
90 192 240 288
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8. Evaluate the expression 53 ?
15 30 125 None of the above
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9. What is the prime factorization of 120?
23 x 3 x 5 2 x 2 x 3 x 5 22 x 32 x 5 3 x 8 x 5
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10. Which equation is true? 16 = 61 23 = 32 24 = 42 34 = 43
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